Holm, John. 1984. Variability of the copula in Black English and its creole kin. American Speech 59. 291-309.
@article{holm1984,
author = {Holm, John},
journal = {American Speech},
key = {Holm 1984},
pages = {291-309},
title = {Variability of the copula in Black English and its creole kin},
volume = {59},
year = {1984}
}